import { directus } from './directus.js'

const CODE_VALIDITY_MS = 10 * 60 * 1000

class VerificationService {

  generateCode() {
    const array = new Uint32Array(1)
    crypto.getRandomValues(array)
    const code = String(array[0] % 1000000).padStart(6, '0')
    const generatedAt = new Date()
    const expiresAt = new Date(generatedAt.getTime() + CODE_VALIDITY_MS)
    return { code, generatedAt, expiresAt }
  }

  isCodeValid(generatedAt) {
    return Date.now() - new Date(generatedAt).getTime() < CODE_VALIDITY_MS
  }

  getRemainingTime(generatedAt) {
    const elapsed = Date.now() - new Date(generatedAt).getTime()
    const remaining = Math.max(0, CODE_VALIDITY_MS - elapsed)
    return Math.ceil(remaining / 1000)
  }

  async verify(listingId, code, imageFile) {
    try {
      const uploaded = await directus.uploadFile(imageFile)

      await directus.patch('/items/listings/' + listingId, {
        verification_code: code,
        verification_image: uploaded.id,
        verification_date: new Date().toISOString(),
        verified: true
      })

      return true
    } catch (e) {
      console.error('Verification failed:', e)
      return false
    }
  }

  isVerified(listing) {
    return listing.verified === true
  }
}

export const verificationService = new VerificationService()